TP – 1207 An Introduction to Water Treatment by Sulfide and Carbonate Precipitation for Professional Engineers

Description

Sulfide precipitation works under the same basic principle as does hydroxide precipitation. The precipitation process converts soluble metal compounds into relatively insoluble sulfide compounds through the addition of precipitating agents, such as Sodium sulfide (Na2S), Sodium hydrosulfide (NaHS), Ferrous sulfide (FeS) and Calcium sulfide (CaS). he precipitation reaction is generally induced under near neutral conditions (pH 7.0 to 9.0). In a way that is similar to hydroxide precipitation, metal sulfide precipitates most often must be physically removed from solution (through coagulation, flocculation, and clarification or filtration), leaving a metal-sulfide sludge.